Room List Store: Fetch rooms after space store is ready + attach store to window (#29453)

* Attach the new store to window

* Fetch rooms after space store is ready

If we fetch a list of rooms and then wait for the space store to be
ready, we will need some way of handling the onAction calls we get
while we wait. These calls are dropped now.

src/@types/global.d.ts

@@ -47,6 +47,7 @@ import { type DeepReadonly } from "./common";
 import type MatrixChat from "../components/structures/MatrixChat";
 import { type InitialCryptoSetupStore } from "../stores/InitialCryptoSetupStore";
 import { type ModuleApiType } from "../modules/Api.ts";
+import type { RoomListStoreV3Class } from "../stores/room-list-v3/RoomListStoreV3.ts";
 
 /* eslint-disable @typescript-eslint/naming-convention */
 
@@ -99,6 +100,7 @@ declare global {
         mxToastStore: ToastStore;
         mxDeviceListener: DeviceListener;
         mxRoomListStore: RoomListStore;
+        mxRoomListStoreV3: RoomListStoreV3Class;
         mxRoomListLayoutStore: RoomListLayoutStore;
         mxPlatformPeg: PlatformPeg;
         mxIntegrationManagers: typeof IntegrationManagers;

src/stores/room-list-v3/RoomListStoreV3.ts

@@ -116,8 +116,8 @@ export class RoomListStoreV3Class extends AsyncStoreWithClient<EmptyObject> {
         if (this.roomSkipList?.initialized || !this.matrixClient) return;
         const sorter = new RecencySorter(this.matrixClient.getSafeUserId());
         this.roomSkipList = new RoomSkipList(sorter, FILTERS);
-        const rooms = this.getRooms();
         await SpaceStore.instance.storeReadyPromise;
+        const rooms = this.getRooms();
         this.roomSkipList.seed(rooms);
         this.emit(LISTS_UPDATE_EVENT);
     }
@@ -244,3 +244,5 @@ export default class RoomListStoreV3 {
         return this.internalInstance;
     }
 }
+
+window.mxRoomListStoreV3 = RoomListStoreV3.instance;